CSA 1912 building program

[Guinness]

The only new ship design in the CSA's 1912(1h) building program is the new fleet oiler CSS Spruce:

Based on the successful fleet tender Ingals, this oiler is designed to cruise with the battlefleet, providing refueling and various stores as needed.



(right click, view picture for full resolution)

Spruce, CSA Fleet Replenishment Ship laid down 1910 (Engine 1909)

Displacement:
   6,496 t light; 6,843 t standard; 15,596 t normal; 22,599 t full load

Dimensions: Length overall / water x beam x draught
   550.00 ft / 540.00 ft x 70.00 ft (Bulges 90.00 ft) x 24.00 ft (normal load)
   167.64 m / 164.59 m x 21.34 m (Bulges 27.43 m)  x 7.32 m

Armament:
      3 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1910 Model
     Breech loading guns in deck mounts
     on centreline ends, majority forward
      6 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1910 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 253 lbs / 115 kg
   Shells per gun, main battery: 250

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -

   - Armour deck: 1.00" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 23,147 shp / 17,268 Kw = 21.00 kts
   Range 77,250nm at 10.00 kts
   Bunker at max displacement = 15,756 tons

Complement:
   697 - 907

Cost:
   £0.401 million / $1.605 million

Distribution of weights at normal displacement:
   Armament: 32 tons, 0.2 %
   Armour: 458 tons, 2.9 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 5 tons, 0.0 %
      - Armour Deck: 453 tons, 2.9 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1,052 tons, 6.7 %
   Hull, fittings & equipment: 3,954 tons, 25.4 %
   Fuel, ammunition & stores: 9,101 tons, 58.4 %
   Miscellaneous weights: 1,000 tons, 6.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     61,971 lbs / 28,110 Kg = 745.0 x 5.5 " / 140 mm shells or 8.8 torpedoes
   Stability (Unstable if below 1.00): 2.21
   Metacentric height 10.0 ft / 3.1 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0.468
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 23.24 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 10.00 ft / 3.05 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26.00 ft / 7.92 m
      - Forecastle (20 %):   24.00 ft / 7.32 m (16.00 ft / 4.88 m aft of break)
      - Mid (50 %):      16.00 ft / 4.88 m
      - Quarterdeck (15 %):   24.00 ft / 7.32 m (16.00 ft / 4.88 m before break)
      - Stern:      24.00 ft / 7.32 m
      - Average freeboard:   18.96 ft / 5.78 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 32.1 %
      - Above water (accommodation/working, high = better): 107.0 %
   Waterplane Area: 24,479 Square feet or 2,274 Square metres
   Displacement factor (Displacement / loading): 409 %
   Structure weight / hull surface area: 99 lbs/sq ft or 482 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.36
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

5t - motor launch
45t - oiling equipment
25t - Marconi
25t - Marconi
900t misc stores

[The Rock Doctor]

The midships 5.5" has a limited arc of fire - I'd be inclined to leave it out.

You need to check something on the machinery page - the SS report shows no weight for machinery, indicating you didn't check something off.

Why the armor deck?

All that being said, the pic's neat, and the type could be useful if CSA has some power projection activities to undertake.

[Guinness]

The midships 5.5" has a limited arc of fire - I'd be inclined to leave it out.

You need to check something on the machinery page - the SS report shows no weight for machinery, indicating you didn't check something off.

Why the armor deck?

All that being said, the pic's neat, and the type could be useful if CSA has some power projection activities to undertake.

Gah! Yeah, I missed the machinery, which I've been doing a lot. :(

I've fixed it and reposted the SS report above.

The midships 5.5" does have a limited field of fire, but alas, it's left in, because certain higher ups insisted on 3 5.5" after they lost the argument about not carrying a whole mess of 88mm's.  ::)

The armored deck was Carthaginian's idea. I simply reused the hull design of the recently commissioned CSA Depot Ship CSS Ingals. I suppose though that the armored deck serves to give very rudimentary protection against plunging fire, in case she gets caught in a fire fight.

As to her intended purpose: The Ingals is attached to the Atlantic Fleet, but the Pacific Fleet was left with no out of port fleet reserve. Spruce will give the Pacific Fleet longer legs, and allow operations further afield (much as Ingals does in her own way for the Atlantic Fleet).

The joke running around the Admiralty though is that she's just a way to get Gran Columbia to waste resources in a tanker building race.  ;)

[The Rock Doctor]

Ah, but then you're blowing your lead:  Gran Colombia's already building three oilers.

[Sachmle]

I'll have to do some digging, and I suck at using the search function, but I think the armored deck, or it's weight at least, on Inglis was to represent something else. Borys and Korpen are good at finding things in old posts, perchance some assistance?

[Borys]

Ahoj!
Give me a scent :) - what I'm to look for?
Borys

[Sachmle]

Ahoj!
Give me a scent :) - what I'm to look for?
Borys

I looked through the post w/ Inglis in it and didn't find anything relating to the armored deck, but I thought Carth had mentioned something about it representing something else, extra strengthening to support the crane, etc...